$(function () {
  var commonfooter =
    '<div class="common-bottom-tips a-text-center" style="background: #353535;font-size: 12px; color: #a7a7a7;">' +
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    '<div>Copyright©2004-2021 新航道前程留学. All Right Reserved</div>' +
    '</div>';
  $('.background').append(commonfooter);
})